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GB1532607A - Fluid control system for multiple circuited work elements - Google Patents

Fluid control system for multiple circuited work elements

Info

Publication number
GB1532607A
GB1532607A GB31786/77A GB3178677A GB1532607A GB 1532607 A GB1532607 A GB 1532607A GB 31786/77 A GB31786/77 A GB 31786/77A GB 3178677 A GB3178677 A GB 3178677A GB 1532607 A GB1532607 A GB 1532607A
Authority
GB
United Kingdom
Prior art keywords
circuit
circuited
control system
fluid control
work elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB31786/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB1532607A publication Critical patent/GB1532607A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

1532607 Fluid pressure control circuits CATERPILLAR TRACTOR CO 28 July 1977 [3 Dec 1976] 31786/77 Heading F1P In a system which comprises first and second circuits 11, 12 with separate pumps 13, 14, a pilot pump 21 and selector valves 22-25 for actuators 15-18, a first by-pass line 30, controlled by a valve 31 is provided between the first and second circuits, and the valve 31 is opened when selected actuators in the first circuit are operated. Further by-pass lines for passing fluid from the second circuit to the first circuit in response to operation of selected actuators in the first circuit are also provided.
GB31786/77A 1976-12-03 1977-07-28 Fluid control system for multiple circuited work elements Expired GB1532607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/747,274 US4112821A (en) 1976-12-03 1976-12-03 Fluid control system for multiple circuited work elements

Publications (1)

Publication Number Publication Date
GB1532607A true GB1532607A (en) 1978-11-15

Family

ID=25004390

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31786/77A Expired GB1532607A (en) 1976-12-03 1977-07-28 Fluid control system for multiple circuited work elements

Country Status (6)

Country Link
US (1) US4112821A (en)
JP (1) JPS5370284A (en)
BE (1) BE860521A (en)
BR (1) BR7707828A (en)
CA (1) CA1052233A (en)
GB (1) GB1532607A (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808196A1 (en) * 1978-02-25 1979-09-06 Bosch Gmbh Robert HYDRAULIC CONTROL DEVICE
JPS55120802U (en) * 1979-02-20 1980-08-27
JPS56501459A (en) * 1979-11-01 1981-10-08
US4354420A (en) * 1979-11-01 1982-10-19 Caterpillar Tractor Co. Fluid motor control system providing speed change by combination of displacement and flow control
JPH0155322B2 (en) * 1980-04-07 1989-11-24 Caterpillar Inc
US4345436A (en) * 1980-04-07 1982-08-24 Caterpillar Tractor Co. Control for load sharing pumps
JPS6129813Y2 (en) * 1980-07-07 1986-09-02
US4378675A (en) * 1981-01-14 1983-04-05 Mobil Oil Corporation Hydraulic pump interlock system
US4561824A (en) * 1981-03-03 1985-12-31 Hitachi, Ltd. Hydraulic drive system for civil engineering and construction machinery
DE3271311D1 (en) * 1981-03-03 1986-07-03 Hitachi Construction Machinery Hydrostatic drive system for civil engineering and construction machinery
KR870000506B1 (en) * 1981-05-02 1987-03-12 니시모도 후미히라(西元文平) Hydraulic circuit system for civil engineering and architectural machinery
JPS5865827A (en) * 1981-10-13 1983-04-19 Hitachi Constr Mach Co Ltd Oil-pressure circuit for civil work and construction machine
JPS5876619A (en) * 1981-10-31 1983-05-09 Hitachi Constr Mach Co Ltd Hydraulic circuit for hydraulic shovel
JPS58146630A (en) * 1982-02-25 1983-09-01 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure working machine
JPS5976660U (en) * 1982-11-13 1984-05-24 東芝機械株式会社 Hydraulic circuit of 2-pump hydraulic excavator
JPS59121061U (en) * 1983-02-04 1984-08-15 新キャタピラ−三菱株式会社 Hydraulic excavator hydraulic circuit
JPS59125563U (en) * 1983-02-09 1984-08-23 新キャタピラ−三菱株式会社 Construction machinery hydraulic circuit
JPS604654U (en) * 1983-06-23 1985-01-14 株式会社小松製作所 Power shovel hydraulic circuit system
JPS6027165U (en) * 1983-07-29 1985-02-23 新キャタピラ−三菱株式会社 Hydraulic excavator hydraulic circuit
JPS6078022A (en) * 1983-10-05 1985-05-02 Yutani Juko Kk Oil-pressure circuit of oil-pressure shovel
JPS6080152U (en) * 1983-10-13 1985-06-04 新キャタピラ−三菱株式会社 Power shovel hydraulic circuit
JPS60133128A (en) * 1983-12-22 1985-07-16 Hitachi Constr Mach Co Ltd Hydraulic circuit of hydraulic excavator
JPH07116721B2 (en) * 1989-01-31 1995-12-13 油谷重工株式会社 Hydraulic circuit of hydraulic excavator
US5115835A (en) * 1990-01-26 1992-05-26 Zexel Corporation Stacked type hydraulic control valve system
US5063739A (en) * 1991-02-19 1991-11-12 Caterpillar Inc. Load sensing hydraulic control system
JPH0776859A (en) * 1993-09-09 1995-03-20 Hitachi Constr Mach Co Ltd Hydraulic pressure drive of construction machinery
JP2892939B2 (en) * 1994-06-28 1999-05-17 日立建機株式会社 Hydraulic circuit equipment of hydraulic excavator
GB9425273D0 (en) * 1994-12-14 1995-02-08 Trinova Ltd Hydraulic control system
KR960021784A (en) * 1994-12-28 1996-07-18 김무 Straight line driving device of heavy equipment
JP3511425B2 (en) * 1995-09-18 2004-03-29 日立建機株式会社 Hydraulic system
US6651426B2 (en) 2002-03-07 2003-11-25 Leon's Mfg. Company, Inc. Loader drive system
ES2401560T3 (en) 2009-12-22 2013-04-22 Hawe Hydraulik Se Hydraulic control
KR102083687B1 (en) * 2013-12-26 2020-04-14 두산인프라코어 주식회사 Combined operation controlling appratus of construction machine
JP7208701B2 (en) * 2018-12-13 2023-01-19 キャタピラー エス エー アール エル Hydraulic control circuit for construction machinery

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DE1952034A1 (en) * 1969-10-15 1971-04-22 Linde Ag Control device for a hydraulic system and valve for this
US3709100A (en) * 1971-06-11 1973-01-09 Caterpillar Tractor Co Hydraulic implement control circuit
US3922855A (en) * 1971-12-13 1975-12-02 Caterpillar Tractor Co Hydraulic circuitry for an excavator
FR2260013B1 (en) * 1974-02-04 1976-10-08 Poclain Sa
DE2500137C3 (en) * 1975-01-03 1980-06-19 O & K Orenstein & Koppel Ag, 1000 Berlin Hydrostatic power steering for SchaufeUader
US4024797A (en) * 1975-10-28 1977-05-24 Caterpillar Tractor Co. Spring centered balanced resolver valve
US4037620A (en) * 1976-04-23 1977-07-26 Eaton Corporation Controller for fluid pressure operated devices

Also Published As

Publication number Publication date
US4112821A (en) 1978-09-12
BE860521A (en) 1978-05-08
BR7707828A (en) 1978-08-22
JPS5370284A (en) 1978-06-22
CA1052233A (en) 1979-04-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee